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AssigneeChevron Phillips Chemical Company LP
InventorsAnand Ramanathan, Max P. McDaniel, Jared Barr, Andrew T. Blagg, Christopher E. Wittner, Alan L. Solenberger, Zachary T. Kilpatrick, Micheal P. Stevens
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Methods for making titanated silica supports, titanated chromium/silica pre-catalysts, and activated titanated chromium/silica catalysts are disclosed in which hydrogen peroxide and an alkali metal precursor are used during catalyst preparation. Resulting titanated chromium/silica pre-catalysts often contain silica, 0.1 to 5 wt. % chromium, 0.1 to 10 wt. % titanium, and less than or equal to 4 wt. % carbon, and further contain an alkali metal or zinc at a molar ratio of alkali metal:titanium or zinc:titanium from 0.02:1 to 3:1 and/or at an amount in a range from 0.01 to 2 mmol of alkali metal or zinc per gram of the silica. High melt index potential activated titanated chromium/silica catalysts can be used to polymerize olefins to produce, for example, ethylene based homopolymers and copolymers having HLMI values of greater than 30 g/10 min.
1-22. (canceled)
An olefin polymerization process, the process comprising contacting a titanated chromium/silica catalyst and an optional co-catalyst with an olefin monomer and an optional olefin comonomer in a polymerization reactor system under polymerization conditions to produce an olefin polymer, wherein the titanated chromium/silica catalyst consists of:
An olefin polymerization process, the process comprising contacting a titanated chromium/silica catalyst and an optional co-catalyst with an olefin monomer and an optional olefin comonomer in a polymerization reactor system under polymerization conditions to produce an olefin polymer, wherein the titanated chromium/silica catalyst consists of:
Dependencies are inferred from the claim text.